[fusion-users] Problem with layer hiding and showing.

[Tómas Guðmundsson]

Mike,

I'm afraid that all I found was the 'showlayers' parameter. And it 
was some kind of a hash,

clientagent	Fusion Viewer
showLayers	0f682be6-0000-1000-8000-001b2418ab2d
operation	GETMAPIMAGE

I don't quite know how to decrypt that but any help would be appreciated.

F.y.i. this is the kind of hash that would be correct with the layers
appropriately displayed.

clientagent	Fusion Viewer
showLayers	0f65c98c-0000-1000-8000-001b2418ab2d
operation	GETMAPIMAGE

The delta is only in the first part.

Regards,
Tómas.

-----Original Message-----
From: Mike Adair [mailto:madair at dmsolutions.ca] 
Sent: 5. ágúst 2008 19:20
To: Tómas Guðmundsson
Cc: fusion-users at lists.osgeo.org
Subject: Re: [fusion-users] Problem with layer hiding and showing.

Tomas,

You should check the value of the 'showlayers' and 'hidelayers' 
parameters in the sequence of mapagent calls to GETMAPIMAGE. Those are 
the parameters that turn layers on or off. If they are what you are 
expecting, then it's possible that there is a problem with specifying 
those params, e.g. they should be comma-separated and they are not, or 
vice versa.

Mike

Tómas Guðmundsson wrote:
>
> Sorry about that. Everything about "If I do nothing else but reload 
> the map (i.e. pan the map, zoom or refresh it) the correct layers are 
> displayed on the map (all 3 or none at all).
>
> So I figure this has something to do with timing or something like 
> that, of the fetching of the map itself?"
>
> Is wrong. So ignore that.
>
> Rgds.
>
> Tómas
>
> *From:* fusion-users-bounces at lists.osgeo.org 
> [mailto:fusion-users-bounces at lists.osgeo.org] *On Behalf Of *Tómas 
> Guðmundsson
> *Sent:* 5. ágúst 2008 13:36
> *To:* fusion-users at lists.osgeo.org
> *Subject:* [fusion-users] Problem with layer hiding and showing.
>
> Hi all.
>
> I currently have function that I am using that systematically goes 
> through an array it's passed and walks through the layer legend to see 
> if it finds a layer. So for every layername in a layerarray, I check 
> if that layer exists and then if the checkbox is checked I show it, 
> else I hide it. Now I've been debugging this and for an array of 3 
> layers (this also happens for layers more than 1), I get 3 times the 
> debug message "showing layer", when I check the checkbox again I get 
> the debug message "hiding layer" 3 times as well.
>
> So I know this is working properly, however Mapguide Server does not 
> think so. Or at least the images I get back from the server are 
> missing one layer (the first one, every time). So according to the 
> legend all 3 layers are visible. However, the map shows everyone 
> except the first one. Now I figured this was weird, especially since 
> when I try to hide them, they all are hidden except the first one 
> which is now visible. And now for the final twist.
>
> If I do nothing else but reload the map (i.e. pan the map, zoom or 
> refresh it) the correct layers are displayed on the map (all 3 or none 
> at all).
>
> So I figure this has something to do with timing or something like 
> that, of the fetching of the map itself?
>
> Please let me know if this is not clear to you and I'll try to explain 
> better, but I find it weird I can not hide more than 2 layers at a time.
>
> Kind regards,
>
> Tómas
>
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